Mondai (問題) means 'problem,' 'question,' or 'trouble.' It can refer to a question in a test or a difficult situation in life that needs a solution. For example, when you don't understand something, you might say 'この問題は難しいです' (This question/problem is difficult).

テストの「問題」や、困ったこと、解決すべき「問題」を指します。例：この問題は難しいです。